Galvanometer sensor
Wireless galvanometer sensor for recording weak currents: electromagnetic induction, thermocouples and photocurrent in six activities.
The sensitive wireless sensor detects weak currents below the measurement range of a conventional ammeter and transmits the data to a digital laboratory system. It supports six experiments: recording the induced current when a magnet moves relative to the coil, observing mutual induction, studying the thermoelectric current of a thermocouple, measuring the weak photocurrent of a photocell, comparing galvanic-cell currents and determining their polarity, and demonstrating Lenz’s law from the direction of the readings. The sensor is used in laboratory activities and demonstrations on electromagnetism in a physics course.
- Recording induced current when a magnet moves relative to a coil (the phenomenon of electromagnetic induction)
- Observation of mutual induced current when the current in an adjacent coil changes
- Study of thermoelectric current of a thermocouple (Seebeck effect)
- Measuring a weak photocurrent when illuminating a photocell
- Comparison of galvanic cell currents and determination of their polarity
- Demonstrating Lenz’s law from the direction of the readings
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